lymphatic tissue in the nasopharynx; pharyngeal tonsils
air sac in the lung
apex of the lung
tip or uppermost portion of the lung. An apex is the tip of a structure.
base of the lung
Lower portion of the lung
smallest branches of the bronchi. Terminal bronchioles lead to alveolar ducts.
branch of the trachea (windpipe) that is a passageway into the lung; bronchial tube.
gas produced by body cells when oxygen and food combine; exhaled through the lungs.
thin hairs attached to the mucous membrane epithelium lining the respiratory tract. They clear bacteria and foreign substances from the lung.
muscle separating the chest and abdomen. It contracts and relaxes to make breathing possible.
lid-like piece of cartilage that covers the larnyx, preventing food from entering the larynx and trachea during swallowing.
breathing out; exhalation
midline region where bronchi, blood vessels, and nerves enter and exit the lungs
breathing in (inhalation)
voicebox; containing the vocal cords
region between the lungs in the chest cavity. It contains the trachea, heart, aorta, esophagus, and bronchial tubes.
openings through the nose carrying air into the nasal cavities
gas that passes into the bloodstream at the lungs and travels to all the body cells.
one pair of almond-shaped masses of lymphatic tissue in the oropharynx.
one of the air cavities in the bones near the nose.
outer fold of pleura lying closer to the ribs and chest wall
throat; including the nasopharynx, oropharynx, and laryngopharynx
double-folded membrane surrounding each lung
space between the folds of the pleura
essential parts of the lung, responsible for respiration; bronchioles and alveoli
process of moving air into and out of the lungs; breathing
inner fold of pleura lying closer to the lung tissue
division of a lung
The exchange of gases in the lung
The exchange of gases in the tissue cells